@charset "UTF-8";
.top-nav {
    display: flex;
    position: sticky;
    top: 0;
    align-items: center;
    justify-content: space-evenly;
    height: 4em;
    box-shadow: rgba(0,0,0,.2) 0 3px 10px 0;
    box-sizing: border-box;
    background-color: #fff;
    font-family: Helvetica, Tahoma, Arial, "PingFang SC", "Hiragino Sans GB", "Heiti SC", STXihei, "Microsoft YaHei", SimHei, "WenQuanYi Micro Hei" !important;
}
.top-nav a{
    display: block;
    text-align: center;
    flex: 1;
    color: #212121;
    font-size: 1em;
    font-weight: 600;
    text-decoration: none;

}
.container {
    display: flex;
    font-family: Helvetica, Tahoma, Arial, "PingFang SC", "Hiragino Sans GB", "Heiti SC", STXihei, "Microsoft YaHei", SimHei, "WenQuanYi Micro Hei" !important;
    width: 85%;
    margin: 0 auto;
    padding: 4em 2em 3em 2em;
    box-sizing: border-box;
}

.main {
    display: flex;
    flex-direction: column;
    flex: 0.65;
}
.main .title {
    font-size: 2em;
    font-weight: 600;
}
.main .article-item {
    width: 40em;
    margin-top: 1.5em;
    border-bottom: #eee solid 1px;
    padding-bottom: 1.5em;
}
.main .article-item .a-title {
    color: #00458b;
    font-size: 2em;
    text-decoration: none;
}
.main .article-item .a-title:hover, .main .article-item .a-title:visited{
    text-decoration: underline;
}
.main .article-item .a-desc {
    margin-top: 1.25em;
    line-height: 2em;
    font-weight: 200;
    letter-spacing: 1px;
}
.main .article-item .a-date {
    margin-top: 1.25em;
    font-size: 1em;
    font-style: italic;
    color: #212121;
}
.column {
    flex: 0.35;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}
.column .title {
    font-size: 1.7em;
    font-weight: 600;
}
.column .desc {
    margin: 1.5em 0 1.5em 0;
    line-height: 1.5em;
    font-size: 1.1em;
    font-weight: 200;
    letter-spacing: 2px;
}
.column .column-item-container {

}
.column .column-item-container .column-item {
    display: block;
    font-size: 1em;
    color: #00458b;
    padding-bottom: 0.5em;
    border-bottom: 1px solid #eee;
    text-decoration: none;
}
.column .column-item-container .column-item .active {
    display: inline-block;
    width: 0;
    height: 10px;
    background-color: #00458b;
    opacity: 0;
    transition: all .4s;
}
.column .column-item-container .column-item:hover .active {
    transform: rotate(135deg);
    margin-right: 10px;
    width: 10px;
    opacity: 1;
}
.column .column-item-container .column-item:not(:first-child) {
    margin-top: 1em;
}